Answer: Motivated blindness
Explanation: Motivated blindness is a psychological phenomenon in which an individual ignores the information and reality which is contradictory to his interest. In such a case, the individual tries to see what he wants to see.
In the given case, Iisa is ignoring the delays in the report prepared by Vanessa as she does not want her superiors to know that.
Thus, from the above we can conclude that Iisa is exhibiting motivated blindness.